import math


# 加法
def add(x, y):
    return x + y


# 减法
def reduce(x, y):
    return x - y


# 乘法
def mul(x, y):
    return x * y


# 乘方
def power(x, y):
    return x ** y


# 除法
def division(x, y):
    if y == 0:
        return False
    return x / y


# 整除
def divisible(x, y):
    if y == 0:
        return False
    return x // y


# 取余
def surplus(x, y):
    if y == 0:
        return False
    return x % y


# 开方
def evolution(x):
    return math.sqrt(x)


if __name__ == '__main__':
    print(add(7, 2))
    print(reduce(7, 2))
    print(mul(7, 2))
    print(power(7, 2))
    print(division(7, 2))
    print(divisible(7, 2))
    print(surplus(7, 2))
    print(evolution(100))
